Differential pressure measuring mechanism

Claim 2

A differential pressure measuring mechanism for high pressure, comprising: means for defining an enclosure; a first and a second annular membrane each having annular corrugation, and inner and outer rims; first and second outer annular support means in the enclosure and respectively secured to the outer rims of the first and second annular membranes, in fluid tight connection therewith; socket means for mounting the first and second annular support means in the enclosure so that the first and second membrane are disposed in axially spaced relation, the socket means provided in-between the membranes, the socket means defining an internal chamber, there being a fluid in said chamber; first and second backing plates on the socket means, respectively facing the first and second membrane and each having contOur where facing the respective membrane matching the corrugation contour of the respective membrane, the membrane respectively exposed to fluids under pressure opposite the respective backing means; first and second inner support means respectively secured to the inner rims of the first and second annular membranes in fluidtight connection therewith; a connecting rod connected to the first and second inner support means, providing rigid connection there-between and passing through said chamber; reaction spring means connected to and acting on the interconnected inner support means for opposing deflection of the membranes; and pick up means in the chamber for providing electrical signals in response to displacement of the inner connected inner support means.

Claim 3

A differential pressure measuring mechanism for high pressure, comprising: means for defining an enclosure; a first and a second annular membrane each having annular corrugation, and inner and outer rims; first and second outer annular support means in the enclosure and respectively secured to the outer rims of the first and second annular membranes, in fluid tight connection therewith; socket means for mounting the first and second annular support means in the enclosure so that the first and second membrane are disposed in axially spaced relation, the socket means provided in-between the membranes, the socket means defining an internal chamber, there being a fluid in said chamber; first and second backing plates on the socket means, respectively facing the first and second membrane and each having contOur where facing the respective membrane matching the corrugation contour of the respective membrane, the membrane respectively exposed to fluids under pressure opposite the respective backing means; first and second inner support means respectively secured to the inner rims of the first and second annular membranes in fluid-tight connection therewith; a connecting rod connected to the first and second inner support means, providing rigid connection there-between and passing through said chamber; reaction spring means connected to and acting on the interconnected inner support means for opposing deflection of the membranes; and pick up means in the chamber for providing electrical signals in response to displacement of the inner connected inner support means.

Claim 4

A differential pressure measuring mechanism for high pressure, comprising: means for defining an enclosure; a first and a second annular membrane each having annular corrugation, and inner and outer rims; first and second outer annular support means in the enclosure and respectively secured to the outer rims of the first and second annular membranes, in fluid tight connection therewith; socket means for mounting the first and second annular support means in the enclosure so that the first and second membrane are disposed in axially spaced relation, the socket means provided in-between the membranes, the socket means defining an internal chamber, there being a fluid in said chamber; first and second backing plates on the socket means, respectively facing the first and second membrane and each having contOur where facing the respective membrane matching the corrugation contour of the respective membrane, the membrane respectively exposed to fluids under pressure opposite the respective backing means; first and second inner support means respectively secured to the inner rims of the first and second annular membranes in fluid-tight connection therewith; a connecting rod connected to the first and second inner support means, providing rigid connection there-between and passing through said chamber; reaction spring means connected to and acting on the interconnected inner support means for opposing deflection of the membranes; and pick up means in the chamber for providing electrical signals in response to displacement of the inner connected inner support means.

Claim 5

A mechanism as in claim 1 a central plate in the chamber and provided with an opening therethrough, the plate dividing the chamber into two like halves, the connecting rod passing through the middle of the central plate, the reaction springs mounted fast on the plate and acting on the rod, respective two halves of the pickup means disposed in the respective chamber halves and being disposed substantially symmetric to the rod.

Claim 6

A mechanism as claimed in claim 1, each measuring membrane having inner and outer upstanding flanges, each said first and second inner support means having an inner plate axially inner of the opening of the annulus of the respective membrane, the inner and outer flanges of each membrane respectively fluid-tight connected to the inner plate and the outer support means respectively.

Claim 7

A mechanism as claimed in claim 3, wherein said inner plate is provided with annular grooves opening outwardly and a compensating membrane having its periphery secured to the inner plate.

Claim 8

A mechanism as claimed in claim 4, and passageways being provided through the socket means, and backing plates and inner plates, for communication between the chamber and space between the compensating membrane and the inner plate.

Claim 9

A mechanism as claimed in claim 3, wherein the inner plates are provided with counter sunk central openings, the connecting rod passing through the openings, and screw nuts on the rod and in the respective sinks of the openings for connecting the inner plates and thereby the measuring membranes with each other.

Claim 10

A mechanism as claimed in claim 1, wherein said spring means have springs symetrically located in the respective halves of the chamber and cylindrical in shape and provided with radial slits to limit action to the axial direction, the springs being secured to the respective ends of the connecting rod as well as to the central plate.

Claim 11

A mechanism as claimed in claim 7, wherein coils having magnetic cores fixed relative thereto are mounted fast with respect to the central plate, and with a magnetic disc adjacent and fixed with respect to the connecting rod, constitute one of said halves of a pickup.

Claim 12

A mechanism as claimed in claim 8, wherein the coils and cores making up both halves of the pickup are mounted fast on a ceramic plate in the opening through the central plate.

Claim 13

A mechanism as claimed in claim 9, wherein said walls of the opening through the central plate is provided with internal grooving receiving corner portions of the ceramic plate.